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78f5dc09ca
Summary: This patch implements exception_ptr on Windows using the `__ExceptionPtrFoo` functions provided by MSVC. The `__ExceptionPtrFoo` functions are defined inside the C++ standard library, `msvcprt`, which is unfortunate because it requires libc++ to link to the MSVC STL. However this doesn't seem to cause any immediate problems. However to be safe I kept all usages within the libc++ dylib so that user programs wouldn't have to link to MSVCPRT as well. Note there are still 2 outstanding exception_ptr/nested_exception test failures. * `current_exception.pass.cpp` needs to be rewritten for the Windows exception_ptr semantics which copy the exception every time. * `rethrow_if_nested.pass.cpp` need investigation. It hits a stack overflow, likely from recursion. This patch also gets most of the `<future>` tests passing as well. Reviewers: mclow.lists, compnerd, bcraig, rmaprath, majnemer, BillyONeal, STL_MSFT Subscribers: mgorny, cfe-commits Differential Revision: https://reviews.llvm.org/D32927 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@302393 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: libcpp-no-exceptions
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// <exception>
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// void rethrow_exception [[noreturn]] (exception_ptr p);
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#include <exception>
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#include <cassert>
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struct A
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{
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static int constructed;
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int data_;
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A(int data = 0) : data_(data) {++constructed;}
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~A() {--constructed;}
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A(const A& a) : data_(a.data_) {++constructed;}
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};
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int A::constructed = 0;
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int main()
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{
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{
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std::exception_ptr p;
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try
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{
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throw A(3);
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}
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catch (...)
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{
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p = std::current_exception();
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}
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try
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{
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std::rethrow_exception(p);
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assert(false);
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}
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catch (const A& a)
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{
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#ifndef _LIBCPP_ABI_MICROSOFT
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assert(A::constructed == 1);
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#else
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// On Windows the exception_ptr copies the exception
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assert(A::constructed == 2);
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#endif
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assert(p != nullptr);
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p = nullptr;
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assert(p == nullptr);
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assert(a.data_ == 3);
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assert(A::constructed == 1);
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}
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assert(A::constructed == 0);
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}
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assert(A::constructed == 0);
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}
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